Fitting for plumbing systems.



H. Y; CARSON.

FITTING FOR PLUMBING SYSTEMS.

APPLICATION flLED JULY 21, 1914.

1,1 86,280. I Patented June 6, 1916.

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HARRY Y. cnnson, on DANVILLE, ILLINOIS.

FITTING FOR PLUMBING SYSTEMS.

Specification of Letters Patent.

Application filed July 21, 1914. Serial No. 852,332.

To all whom it may concern Be it known that I, HARRY Y. CARSON, a citizen of the United States, residing at Danville, Vermilion county, Illinois, have invented new and useful Improvements in Fittings for Plumbing Systems, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure 1 shows an elevation of a system showing the application of my improved fittings thereto; Fig. 2 shows one of the fittings in side elevation; Fig. 3 is a section on lines IIIIII of Fig. 2; Fig. I is an elevation of the fitting turned at right angles from the showing of Fig. 2; Fig. 5 is a section on lines VV of Fig. l; and Fig. 6 shows the application of a modified form of my fitting.

My invention relates to fittings for plumbing systems, and consists in the employment of a fitting in a waste line of a plumbing system which reduces the quantity of air handled within the system to a minimum, and causes the falling sewage to cling to and follow the inside surface of the waste stack, thereby creating an uninterrupted passage through the central section of the stack through which the air will pass.

My invention also provides,.in the ordinary loop or circuit method of venting, adequate means of relieving the air pressure from the stack at each floor level, with the result that the air re-circulates within the system without endangering the blowing out of the water seals of the fixtures which are connected at various points with the system.

Referring to the drawings A indicates the vertical waste stack, 13 the vent line, C the fixtures, D the fitting to which my invention is particularly directed, and E a bend connected to the bottom of the waste stack A. The fitting D is of helical shape, and has a branch connection 2, taken ofif on a tangent, just above the bulge 3 of the fitting. The branch 2 is intended to connect with the waste line 4 from a fixture C. The vent branch 5 connects the waste line A with the vent line B. At'its bottom the stack A is connected to the bend E, which has on the inner side of the bend a branch 6, which is connected with the bottom of vent line B. As indicated the fittings D are located at the various floor levels, and are provided with a suitable branch 2 for the reception of the waste from the fixtures C upon that fioor. In installations where the waste stack A extends a considerable distance without connection with the fittings D, or where the horizontal waste lines l do not enter the stack at each floor level, I interpose my improved fitting D without any branch, as is shown in Fig. 1, for the purpose of reducing the velocity of the sewage falling down the stack, and of maintaining it in centrifugal motion thereby preventing excessive air or, gas pressures. Then a plumbing system has been equipped with my invention as described above, the waste as it descends clings to and follows the inside surfaces of the stacks, and thereby leaves a central passage down the center of the fittings through which the air will pass. Another advantage is that by following the helically shaped walls of the fittings D the velocity of the waste in falling will be very greatly reduced with the result that the air pressure is very greatly diminished, so that the air pressure will not become great enough to blow through the water seals in the various fixtures G.

In Fig. 6 I have shown a modified form of my device in which no vent line is employed. In this form the branch 2 of the fitting D is located immediately below the bulge 3 of the fitting, and the branch enters the fitting at this point in a tangential direc tion. I have also shown a specially formed parabolical fitting E at the base of the stack A, in which there is a return 7 the purpose of which is to carry off the air that is found at the base of the stack, and thereby relieve back pressures within the stack and in the fixture connections.

It is obvious that various modifications may be made in the construction which I have shown and described herein, without departing from my invention.

hat I claim is:

1. A fitting for aplumbing system consisting in a helically shaped member having ends adapted for connection'with a vertical waste stack and a middle portion arranged out of line with the vertical axis of the stack.

2. A fitting for a plumbing system consistends in vertical alinement with the stack and Patented June 6, 191 6.

ing of a helically shaped member having its ranged out of alinement with the vertical axis of the stack, and a Waste inlet arranged to enter the fitting on a tangent thereto.

HARRY Y. CARSON.

its middle portion distorted to give the Waste a whirling action and thereby form an air passage through the central portion thereof.

3. A fitting for a plumbing system consisting of a helically shaped member hav ing its ends adapted for connection with a vertical Waste stack. a middle portion ar- Witnesses ETI-IEL M. BRIGGS, KENNETH POMEROY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

